CN218628766U - Digital gas-electric converter - Google Patents
Digital gas-electric converter Download PDFInfo
- Publication number
- CN218628766U CN218628766U CN202023306737.6U CN202023306737U CN218628766U CN 218628766 U CN218628766 U CN 218628766U CN 202023306737 U CN202023306737 U CN 202023306737U CN 218628766 U CN218628766 U CN 218628766U
- Authority
- CN
- China
- Prior art keywords
- pressure
- pressure sensor
- gauge
- gas
- formula
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Measuring Fluid Pressure (AREA)
Abstract
The utility model aims at providing a digital gas-electricity converter for improve measurement accuracy, including accurate formula pneumatic stabiliser, differential pressure formula pressure sensor, choke valve, gas gauge head, accurate formula pneumatic stabiliser give vent to anger the end and be connected through the inlet end of throttle valve with the gas gauge head, and two differential pressure interfaces of differential pressure formula pressure sensor detect air supply atmospheric pressure and gas gauge head atmospheric pressure respectively, differential pressure formula pressure sensor is for being used for detecting the first gauge pressure formula pressure sensor of air supply atmospheric pressure respectively and be used for detecting the second gauge pressure formula pressure sensor of gas gauge head atmospheric pressure, replaces original differential pressure formula pressure sensor through setting up two gauge pressure formula pressure sensor, no longer directly with the gas gauge head with multiply the proportionality coefficient after subtracting air supply atmospheric pressure, but with the precomputed proportionality coefficient respectively to gas gauge head department atmospheric pressure and air supply atmospheric pressure, can reduce the error that the coefficient difference that the air supply fluctuation brought, improved measurement accuracy.
Description
Technical Field
The utility model belongs to the technical field of the gas-electricity conversion, concretely relates to digital gas-electricity converter.
Background
The gas-electric converter is a device for converting the difference value of the workpiece detected by the gas probe relative to the standard part into an analog voltage signal and amplifying the analog voltage signal into a voltage range required by the AD board card of the industrial personal computer.
At present, a domestic gas-electricity converter mainly comprises a precision pneumatic voltage stabilizer 1, a differential pressure type pressure sensor 2, a pressure signal voltage amplifying circuit, a throttle valve 3 and a gas measuring head 4, wherein a gas outlet end of the precision pneumatic voltage stabilizer 1 is connected with a gas inlet end of the gas measuring head 4 through the throttle valve 3, two differential pressure interfaces of the differential pressure type pressure sensor 2 are used for respectively detecting gas source pressure and gas measuring head pressure and finally outputting a direct equal proportion difference value of the two pressures, but the two values of the gas source pressure and the gas measuring head pressure measured by the traditional differential pressure type pressure sensor are directly subtracted and then multiplied by a proportion coefficient q to obtain data to be measured, the data is essentially equivalent to the gas source pressure multiplied by q-the gas measuring head pressure multiplied by q, the gas source pressure is fluctuated, so that the requirement on the pneumatic voltage stabilizer is higher, the purpose of setting the precision pneumatic voltage stabilizer is also realized, the purpose of setting precision inaccurate starting is realized, and even if the precision pneumatic voltage stabilizer is set, the consistency of the proportion coefficient can be completely guaranteed, and the data obtained by multiplying the same proportion coefficient can still result in practical application.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a digital gas electric converter for improve measurement accuracy.
The technical proposal of the utility model for solving the technical problem is that: the utility model provides a digital gas-electric converter, includes accurate pneumatic stabiliser, differential pressure formula pressure sensor, choke valve, gas gauge head, and accurate pneumatic stabiliser give vent to anger the end and is connected with the inlet end of gas gauge head through the throttle valve, and differential pressure formula pressure sensor's two differential pressure interfaces detect air supply atmospheric pressure and gas gauge head atmospheric pressure respectively, differential pressure formula pressure sensor is for being used for detecting the first gauge pressure formula pressure sensor of air supply atmospheric pressure and being used for detecting the second gauge pressure formula pressure sensor of gas gauge head atmospheric pressure respectively, first gauge pressure formula pressure sensor connects on the gas circuit between choke valve and accurate pneumatic stabiliser, second gauge pressure formula pressure sensor connects on the gas circuit between choke valve and gas gauge head, still including being used for respectively carrying out the first amplifier circuit, the second amplifier circuit that amplify first gauge pressure formula pressure sensor and second gauge pressure formula pressure sensor signal, carry out analog to first gauge pressure formula pressure sensor and second gauge pressure formula pressure sensor signal after amplifier circuit handles respectively, second ADC circuit, CPU, embedded pressure sensor's output loops through embedded ADC circuit and second ADC circuit and ADC are connected with the embedded pressure sensor.
The intelligent gas-electric converter is characterized by further comprising an RS485 bus interface, wherein one end of the RS485 bus interface is connected with the embedded CPU, the other end of the RS485 bus interface can be connected with an upper computer, and the combination of 64 gas-electric converters can be achieved at most.
The utility model has the advantages that: the two gauge pressure type pressure sensors are arranged to replace an original differential pressure type pressure sensor, the air pressure of the air source is not directly subtracted from the air pressure of the air measuring head and then multiplied by a proportionality coefficient, the air pressure of the air measuring head and the air pressure of the air source are multiplied by the proportionality coefficient which is calculated in advance, errors caused by coefficient differences due to air source fluctuation can be reduced, and the measuring precision is improved.
Drawings
Fig. 1 is a schematic diagram of a gas-electric converter using a differential pressure type pressure sensor.
Fig. 2 is a schematic diagram of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
As shown in fig. 1, the utility model discloses a precision type pneumatic stabiliser 1, differential pressure formula pressure sensor 2, choke valve 3, gas gauge head 4, precision type pneumatic stabiliser 1 give vent to anger the end and be connected with the inlet end of gas gauge head 4 through choke valve 3, and two differential pressure interfaces of differential pressure formula pressure sensor 2 detect air supply atmospheric pressure and gas gauge head 4 atmospheric pressure respectively, differential pressure formula pressure sensor 2 is for being used for detecting first gauge pressure formula pressure sensor 5 of air supply atmospheric pressure respectively and be used for detecting second gauge pressure formula pressure sensor 6 of gas gauge head 4 atmospheric pressure, first gauge pressure formula pressure sensor 5 is connected on the gas circuit between choke valve 3 and precision type pneumatic stabiliser 1, second gauge pressure formula pressure sensor 6 is connected on the gas circuit between choke valve 3 and gas gauge head 4, still including being used for carrying out the first amplifier circuit 7, the second amplifier circuit 8 that enlarge to first gauge pressure formula pressure sensor 5 and second gauge pressure formula pressure sensor 6 signal respectively, second amplifier circuit 7, second amplifier circuit 8, the first gauge pressure sensor 5 and second ADC 11 embedded ADC pressure sensor 10 that the signal after amplifier circuit handles through amplifier circuit respectively the amplifier circuit is connected with CPU embedded ADC output end, the embedded ADC pressure sensor 11 loops through the embedded pressure circuit 11 and the embedded ADC pressure sensor output end of second ADC circuit 11, the ADC pressure sensor 11.
The intelligent gas-electric converter is characterized by further comprising an RS485 bus interface, wherein one end of the RS485 bus interface is connected with the embedded CPU, the other end of the RS485 bus interface can be connected with an upper computer, and the combination of 64 gas-electric converters can be achieved at most.
When the air source pressure measuring device is used, firstly, the proportionality coefficient q1 of air source pressure and the proportionality coefficient q2 of air pressure of the air measuring head 4 need to be set, when the proportionality coefficient q1 of the air source pressure is set, a standard component is measured, and the proportionality coefficient q1 of the air source pressure is converted according to the change of the air source pressure and the change of a measuring result through the change of the air source pressure; when setting up 4 atmospheric pressure proportionality coefficients of gas gauge head, keep air supply pressure unchangeable, measure a plurality of standard component, carry out the difference conversion department proportionality coefficient q2 of measuring result to a plurality of standard component according to the difference between the standard component, like this, alright input two coefficients q1 and q2 in CPU, two gauge pressure formula pressure sensor can multiply coefficient q1 and coefficient q2 respectively when actual measurement, be equivalent to air supply atmospheric pressure x q 1-4 atmospheric pressure x q2 of gas gauge head, independently come out two proportionality coefficients, the independent calculation and the setting, this is also the utility model discloses a principle.
The utility model discloses a set up two table pressure formula pressure sensor and replace original differential pressure formula pressure sensor, no longer directly with multiplying the proportionality coefficient after subtracting air supply atmospheric pressure with gas measurement head atmospheric pressure, but to gas measurement head department atmospheric pressure and air supply atmospheric pressure multiplying the proportionality coefficient that the precomputation is good respectively, can reduce the error that the coefficient difference that the air supply fluctuation brought caused, improved measurement accuracy.
Claims (2)
1. The utility model provides a digital gas-to-electricity converter, includes accurate pneumatic stabiliser, differential pressure formula pressure sensor, choke valve, gas gauge head, and accurate pneumatic stabiliser's the end of giving vent to anger is connected through the inlet end of choke valve with the gas gauge head, and two differential pressure interfaces of differential pressure formula pressure sensor detect air supply atmospheric pressure and gas gauge head atmospheric pressure respectively, its characterized in that: the differential pressure type pressure sensor is a first gauge pressure type pressure sensor used for detecting air pressure of an air source and a second gauge pressure type pressure sensor used for detecting air pressure of an air measuring head, the first gauge pressure type pressure sensor is connected to an air path between a throttling valve and a precision type pneumatic voltage stabilizer, the second gauge pressure type pressure sensor is connected to an air path between the throttling valve and the air measuring head, the differential pressure type pressure sensor further comprises a first amplifying circuit and a second amplifying circuit which are used for amplifying signals of the first gauge pressure type pressure sensor and the second gauge pressure type pressure sensor respectively, a first ADC circuit and a second ADC circuit which are used for performing analog-to-digital conversion on the signals of the first gauge pressure type pressure sensor and the second gauge pressure type pressure sensor after being processed by the amplifying circuits respectively, and an embedded CPU, wherein the output end of the first gauge pressure type pressure sensor is connected with the embedded CPU through the first amplifying circuit and the first ADC circuit in sequence, and the output end of the second gauge pressure type pressure sensor is connected with the embedded CPU through the second amplifying circuit and the second ADC circuit in sequence.
2. A digital gas-to-electric converter as claimed in claim 1, characterized in that: the system also comprises an RS485 bus interface, wherein the RS485 bus interface is connected with the embedded CPU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023306737.6U CN218628766U (en) | 2020-12-31 | 2020-12-31 | Digital gas-electric converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023306737.6U CN218628766U (en) | 2020-12-31 | 2020-12-31 | Digital gas-electric converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218628766U true CN218628766U (en) | 2023-03-14 |
Family
ID=85420827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023306737.6U Active CN218628766U (en) | 2020-12-31 | 2020-12-31 | Digital gas-electric converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218628766U (en) |
-
2020
- 2020-12-31 CN CN202023306737.6U patent/CN218628766U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101936791B (en) | Digital pressure gauge | |
| CN201293698Y (en) | Pressure transmitter with temperature compensation circuit | |
| CN101858811A (en) | Method for compensating signal of high-precision pressure sensor | |
| CN108956009B (en) | Piezoelectric pressure sensor calibration method and device | |
| CN102052991B (en) | Method for setting temperature compensation factor of pressure sensor | |
| CN102519666B (en) | Digital temperature compensation system and method | |
| CN201754115U (en) | Digital pressure meter | |
| CN113951859A (en) | Intracranial pressure sensor signal conditioning method | |
| CN218628766U (en) | Digital gas-electric converter | |
| CN102866180B (en) | High-precision intelligent acidity meter and measuring method thereof | |
| CN206488794U (en) | A kind of high precision electro bridge circuit of resistance strain type sensor | |
| CN205785249U (en) | The system of resistance sensor measured by bridge circuit | |
| CN206740279U (en) | A kind of pressure measurement circuitry | |
| CN201335734Y (en) | Long line compensator circuit for weighting sensor | |
| CN206649007U (en) | Gas sensor temperature compensation means | |
| CN112097632B (en) | Nonlinear correction method for constant-voltage bridge for large strain measurement of three-wire system quarter bridge | |
| CN113017588B (en) | Blood pressure measuring method, system, device and sphygmomanometer | |
| CN217716287U (en) | Sampling system based on six-wire system full bridge | |
| CN211317573U (en) | Temperature data acquisition circuit with isolation function | |
| CN106644193A (en) | Pressure intensity value determination method and system | |
| CN113514173A (en) | Anti-interference circuit based on pressure sensor, control method and pressure sensor | |
| CN113739881B (en) | Temperature drift resistant weighing sensor signal measuring circuit | |
| CN206488792U (en) | A kind of high-precision single arm bridge circuit of sketch-based user interface method | |
| CN213986629U (en) | Precision sensitivity measuring circuit | |
| CN219351711U (en) | Wide-range small-signal amplifying circuit and redox voltage measuring circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |